seems like it has been with called Hubam since about its discovery
"Abstract
Preliminary tests made by the Iowa Agricultural Experiment Station of Hubam, the annual white sweet clover discovered in 1916 by H. D. Hughes of the Farm Crops Section at this station, indicate that this crop will probably prove to be the best green manure crop to seed with small grain in the spring and plow down in the fall of the same year, on soils which are well drained and not acid."
Wilkins (1922)
https://core.ac.uk/download/pdf/38890103.pdf
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